Allow the server to build with berkeley db 4.4 or later. Fedora 7 ships with
db4.5 by default, so we should be able to use it. Note that this doesn't mean
to fully test and take advantage of all of the new features in 4.3, 4.4, and 4.5
- this will only allow the server to build and run, to make it available to
other developers to work on.

Reviewed by: nkinder (Thanks!)
Files: see diff
Branch: HEAD
Fix Description: db.m4 already had code to detect and use the correct version of
db headers and libraries. There have been some minor api changes since 4.3, so
not much code changes were required. Note that this merely allows the server to
build and run with db4.4 or later, not to take advantage of the newer features
of the API.
Platforms tested: FC7
Flag Day: no
Doc impact: no
Checking in ldapserver/ldap/servers/plugins/replication/cl5_api.c;
/cvs/dirsec/ldapserver/ldap/servers/plugins/replication/cl5_api.c,v <-- cl5_api.c
new revision: 1.13; previous revision: 1.12
done
Checking in ldapserver/ldap/servers/slapd/back-ldbm/dblayer.c;
/cvs/dirsec/ldapserver/ldap/servers/slapd/back-ldbm/dblayer.c,v <-- dblayer.c
new revision: 1.17; previous revision: 1.16
done
Checking in ldapserver/ldap/servers/slapd/back-ldbm/perfctrs.c;
/cvs/dirsec/ldapserver/ldap/servers/slapd/back-ldbm/perfctrs.c,v <-- perfctrs.c
new revision: 1.6; previous revision: 1.5
done